Electrical nerve stimulator



FIG. 1 is a perspective view of an electrical nerve stimulator showing our new design;

FIG. 2 is a left side view thereof;

FIG. 3 is a right side view thereof;

FIG. 4 is a top view thereof;

FIG. 5 is a bottom view thereof;

FIG. 6 is a front view thereof; and,

FIG. 7 is a rear view thereof.

The broken lines illustrate structure or features which form no part of the claimed design. 

CLAIM The ornamental design for an electrical nerve stimulator, as shown and described. 